. >> mitt romney walk away with more than half of the super tuesday delegates. he says it is time for his opponents to stand down. it was hardly a knockout win, but after victories in six of 10 super tuesday contests, including the battleground state of ohio, mitt romney says of the writing is on a wall. >> we have the time and resources and the plan to get all the delegates. we think that will get done before the convention appeared >> they're now focusing on upcoming races in kansas, mississippi, and alabama. and the political maneuvering is intense. >> i feel very good about last night. >> following victories in three predominantly republican states, and a near win ohio, rick santorum supporters are asking newt gingrich to step aside. the former speaker only got the most votes in his home state of georgia. >> gingrich's rejecting all calls to drop out. >> i am staying in this race because i believe that it is possible for a moderate to win the general election. >> ron paul is still hanging on. his campaign wants to collect enough delegates at the convention f